Process of assembling plier members.



w.' s. THOMSON.

PROCESS OF ASSEMBLING PLIER MEMBERS.

APPLICATION FILED MAY 27. IBIS- 1, 177,738. Patented A r; 4,1916.

E? .Z, I w J z 13 E 12 /o I/ 7 Ti .4 T1 .5 z j THE COLUMBIA PLANOGRA'PH :10., WASHINGTON, D. c.

STATES PATENT OFFICE.

s. THOMSON, or PLANTSVILLE, oon nnc'rroo'r, ssrsuon TO THE H. 1). SMITH 8;. COMPANY, or PLANTSVILLE, CONNECTICUT, A CORPORATION.

PROCESS OF ASSEMBLING PLIER MEMBERS.

Application filed May 27, 1915. Serial No. some.

To all whom it may concern;

Be it known that I, WILLIAM S. THOM- soN, a citizen of the United States, residing atPlantsville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Processes of Assembling Plier Members, of which the following is a specification.

My invention relates to improvements in processes of assembling plier members, and the object of my improvementis to facilitate the assembling of such members so that they will cooperate freely and by means that are simple and reliable.

In the accompanying drawing :Figure 1 is a plan view of a pair of pliers composed of plier members that are assembled by my improved process. Fig. 2 is a similar view of the middle member that composes the middle portion of thejoint. Fig. 3 is a side elevation of the same. Figs. 4 and 5 are views corresponding to Figs. 2 and 3 of the inclosing member which composes the outer or inclosing portion of the joint. Fig. 6 is a plan view, on an enlarged scale, of the joint portion shown in Fig. 1, and with a piece of paper positioned between the 0pposed joint faces of the middle and inclosing member. Fig. 7 is a sectional view on the line a: a: of Fig. 6. Fig. 8 is a view corresponding to Fig. 1 and on the same scale, showing a different form of pliers whose joint members are assembled by my improved process. Fig. 9 is a similar view on an enlarged scale of the joint portion of the same, with a piece of paper interposed between the opposed joint faces of the plier members. Fig. 10 is a sectional view on the line g y of Fig. 9.

The pliers shown in Fig. 1 have the cooperating members connected by a box joint composed of amiddle joint portion 10 of plate-like form interconnecting the handle 11 and jaw 12 of one of the members designated as the middle member, and have on each side of the said middle portion 10 apair of side or inclosing joint portions 13 interconnecting the handle 11 and jaw 12 of the other member, designated as the inclosing member, a pivotal pin 14 passing through and serving to pivotally connect the said middle joint portion 10 and side or inclosing joint portions 13. The opposed faces of the middle joint portion 10 and the side joint por- Specification of Letters Patent.

Patented Apr. 4,1916.

tions 13 are plain and operate as cooperating bearing surfaces.

In the construction and assembling of the pliermembers shown and described the middle member, having the middle joint portion 10, is formed by forging and finished in substantially the final completed form previous to assembling.

In the case of the making of the inclosing member the box opening 15 between the side joint members 13 is formed of the size desired and opened up to permit the middle joint portion 10 to be brought into proper position therein, after which the side joint portions 13 are closed against the middle joint portion 10, and then the rivet 14 is put in place. I

The features so far described are ordinary, and the usual result is that the operation of heading the rivet- 14 serves to bring the opposed bearing faces of the joint por tions into close contact. It is obvious that by following the plan described the heading of the rivet 14 mentioned may unless special care is taken, involve some skill in manipulation, and the result may be a binding en gagement of the said bearing surfaces in lieu of the sort of engagement desired, permitting of a relatively free movement of the parts.

The condition desired is a close fit of the parts, and at the same time avoiding excessive or undue friction and this condition is obtained in a positive manner by the use of my improved process which is carried out as follows :Previous to closing side joint portions 13 against the middle joint portion 10 a piece of card board or paper 16 or other suitable material, preferably of fibrous character, is interposed between a pair of opposed bearing surfaces, as shown in Figs. 6 and 7 the assembling after this, being effected in the ordinary manner, except that no particular concern need be given to the feature of the pressure brought to bear against the opposed portions of the cooperating mem-.

bers due to the heading of the pivotal rivet 14. Accordingly, no particular skill is required to effect the assembling of the members by my process, as there is no possibility of bringing the parts too close, provided of course a proper thickness of paper has been used.

After riveting as described, with the paper between the parts, the plier members are rigidly secured together and they are fixed by the removal of the paper in any manner desired, one way of doing this is to forcibly move the parts back and forth relatively one to the other, whereby the paper will be essentially ground to pieces and will be gradually worked out of the joint.

As stated, the result of the riveting with the use of the paper is that the plier members are rigidly secured together, and this is an important feature of my invention, for because of their being so rigidly secured, they may be handled in the finishing process as a unit. Such finishing process involves grinding and buffing of essentially the entire outside surface of all of the parts except in most cases the handles 11, which may be rough. In case the tool is to be nickel plated of course the handles also will be so finished.

I believe that the use of the paper between the opposed bearing surfaces of the joint of plier members to be new, and the results that follow from the use of the same is the securing of the plier members rigidly together to facilitate finishing the same as a unit and to insure a positive free operating condition of the parts after the removal of the paper.

In the pliers shown in Figs. 8, 9 and 10 the joint is formed by overlapping Copies of this patent may be obtained for portions 10 the handles 11 extending laterto other forms of plier members and tools having moving parts.

I claim as my invention I The process of assembling and finishing plier members having opposed bearing surfaces comprising interposing a layer of Except for the portion.

fibrous material between the said bearing surfaces, rigidly securing the said members together by riveting with the said material so interposed therebetween, finishing the ex teriorsurface of the said members While so secured, and finally removing the said material from between the said surfaces.

' WILLIAM s. THOMSON.

Witnesses:

GEO. R. BOND, E. H. GALPEN.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

